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Add CPlane::rayPlaneIntersection

This commit is contained in:
Jack Andersen 2017-09-17 17:02:19 -10:00
parent 9d40c78f6e
commit 16985b0e9b
2 changed files with 20 additions and 1 deletions
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4
include/zeus/CPlane.hpp
View File

@ -48,11 +48,13 @@ public:
d = nd * mag; d = nd * mag;
} }
float pointToPlaneDist(const zeus::CVector3f& pos) const float pointToPlaneDist(const CVector3f& pos) const
{ {
return pos.dot(vec) - d; return pos.dot(vec) - d;
} }
bool rayPlaneIntersection(const CVector3f& from, const CVector3f& to, CVector3f& point) const;
const CVector3f& normal() const { return vec; } const CVector3f& normal() const { return vec; }
inline float& operator[](size_t idx) { return p[idx]; } inline float& operator[](size_t idx) { return p[idx]; }

17
src/CPlane.cpp
View File

@ -1 +1,18 @@
#include "zeus/CPlane.hpp" #include "zeus/CPlane.hpp"
namespace zeus
{
bool CPlane::rayPlaneIntersection(const CVector3f& from, const CVector3f& to, CVector3f& point) const
{
zeus::CVector3f delta = to - from;
if (std::fabs(delta.normalized().dot(vec)) < 0.01f)
return false;
float tmp = -pointToPlaneDist(from) / delta.dot(vec);
if (tmp < -0.f || tmp > 1.0001f)
return false;
point = delta * tmp + from;
return true;
}
}